Non-fiction covers a wide range of books, so I'd first try to narrow down your choices by focusing on your general interests. You'll enjoy listening to the audiobooks much more if you find them interesting, rather than simply reading/listening because you feel that they're "must-reads. " This list is a good starting point because it divides up the recommended books by topic: english.uiowa.edu/nonfiction/readinglist....
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.